Release 21

* Fix bug that prevents group sharing if client is unable to complete login.
* Fix for a crash while trimming in certain situations.
* Added the Ligand Queue: The Ligand Queue allows players to to cycle through a list of per-generated ligands. This tool will become useful in future puzzles the help determine starting ligand categories in conjunction with tools like the compound library.
* Added context sensitive help. Some GUI elements now have little question mark icons in their tooltips, which indicates there's a corresponding help page. Pressing the Help hotkey (default "F1" or "Alt-H") when the tooltip is open will take you directly to that help page.
* Fixed crash in the trim action
* Fixed undo behavior for the trim action
* Fix bug where the Compound Library Objective wasn't recognizing compounds from the Compound Library.
* Fix internal issue with MMFF Wiggle in certain cases.
* Fix internal issue with how the small molecule design panel bond introduction works.